Thomas Wouters wrote:
>
>
> On 6/20/07, *Nick Coghlan* <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>> wrote:
>
> Strings are explicitly disallowed (because Guido doesn't want a second
> way to spell ''.join(seq), as far as I know):
>
>
> More importantly, because it has positively abysmal performance, just
> like the reduce() solution (and, in fact, many reduce solutions to
> problems better solved otherwise :-) Like the old input(), backticks and
> allowing the mixing of tabs and spaces, while it has uses, the ease and
> frequency with which it is misused outweigh the utility enough that it
> should not be in such a prominent place.
The rejected suggestion which lead to the current error message was for
sum(seq, '') to call ''.join(seq) behind the scenes to actually do the
string concatenation - the performance would have been identical to
calling ''.join(seq) directly. You certainly wouldn't want to use the
same summing algorithm as is used for mutable sequences - as you say,
the performance would be terrible.
Cheers,
Nick.
--
Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia
---------------------------------------------------------------
http://www.boredomandlaziness.org
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